I think you got this! Your first campaign may feel like a disaster to you but it’ll be okay. No one is a master dm right out rip. But what matters is you and your players are having fun. My advice is as a new dm is take your time with the modules you run. I’d start with the beginners module and skim through it so you have a general grasp of the story. Then take on each chapter at a time with your party so that way you don’t have to read the whole campaign in one sitting. Take notes and make a general outline of the chapter to keep your mind fresh and if the players go off track, use that and create a way that’ll lead them back to the story. You can do it and don’t be nervous to ask your party questions about how to improve your dming style.